Feature:1. Alloy Steel: Adopt high quality alloy steel material, safe and environmental protection, strong and durable. High working efficiency.2. Positive and Negative Rotation Regulable: Press the black head inward to adjust the positive and negative rotation. To the left is to loosen the screw, to the right is to tighten the screw.3. Removable Head: The head of our impact screwdriver is detachable and can be attached to either a matching drill or a socket for a variety of uses.4. A Variety of Bits: Impact grade bits with milled tips for precise fit. Equipped with 12 screwdriver bits to meet your replacement needs for easy replacement and use. Also, the impact driver has and a non slip knurled grip.5. Applicability: Ideal for loosening or removing firmly tightened or rusted screws for motorcycle work or engine repair.How to Use:The screwdriver bit is aligned with the screw, directly hit the rear of the impact screwdriver with a hammer, the front of the screwdriver bit will automatically rotate, the head can be adjusted forward and reverse, and both the upper and lower screws can beSpecification:Item Type: 12Pcs Steel Impact Screwdriver Driver SetMaterial: S2 Alloy SteelUse: For stubborn screwsSystem: Metric system Package List:1 x Handle1 x Connector ( Already Mounted on The Handle)10 x Screwdriver Bit1 x Storage box